February 2021 Antimicrobial Use and Resistance (AUR) Module Contents Antimicrobial Use and Resistance (AUR) Module ................................................................................. 1 Introduction .................................................................................................................................................. 1 1. Antimicrobial Use (AU) Option ................................................................................................................. 2 Introduction ......................................................................................................................................... 2 Requirements ....................................................................................................................................... 3 Data Analyses ....................................................................................................................................... 8 References .......................................................................................................................................... 14 Appendix A. Table of Instructions: Antimicrobial Use Option ........................................................... 15 Appendix B. List of Antimicrobials...................................................................................................... 17 Appendix C. Example Calculations of Antimicrobial Days .................................................................. 21 Appendix D: List of SAARsa ................................................................................................................. 24 Appendix E: Antimicrobial Groupings for SAAR & Rate Table Calculationsa ...................................... 27 2. Antimicrobial Resistance (AR) Option ..................................................................................................... 34 Introduction ....................................................................................................................................... 34 Requirements ..................................................................................................................................... 35 Data Analyses ..................................................................................................................................... 42 References .......................................................................................................................................... 48 Appendix F. List of Eligible Organisms for the NHSN AR Option ........................................................ 49 Appendix G. Technical and Isolate Based Report Variables ............................................................... 55 Appendix H. Denominator Data Variables ......................................................................................... 58 Appendix I. NHSN AR Option Phenotype Definitions ......................................................................... 60 Introduction This module contains two options: one focused on antimicrobial use and the second on antimicrobial resistance. To participate in either option, facility personnel responsible for reporting antimicrobial use (AU) or resistance (AR) data to the National Healthcare Safety Network (NHSN) must coordinate with their pharmacy and/or laboratory information software providers to configure their system to generate standard formatted file(s) to be imported into NHSN. The format provided for data submission follows the Health Level 7 (HL7) Clinical Document Architecture (CDA) standard.7 Manual data entry is not available for the AUR Module. Facilities can participate in one (AU or AR) or both (AU and AR) options at any given time. Purpose The NHSN AUR Module provides a mechanism for facilities to report and facilities and NHSN Group users to analyze antimicrobial use and/or resistance data to inform benchmarking, reduce antimicrobial resistant infections through antimicrobial stewardship, and interrupt transmission of resistant pathogens at individual facilities or facility networks.6 14-1 February 2021 1. Antimicrobial Use (AU) Option Introduction Antimicrobial resistance rates continue to increase in hospitals across the United States.1 One of the five CDC core actions to combat the spread of antimicrobial resistance is improving the use of antimicrobials.2 Studies show that providing timely and reliable feedback of information to clinicians regarding their prescribing practices, such as through antimicrobial usage reports, can improve appropriateness of antimicrobial use.3-5 Objectives: The primary objective of the Antimicrobial Use (AU) Option is to facilitate risk-adjusted inter- and intra-facility antimicrobial use benchmarking. A secondary objective is to evaluate antimicrobial use trends over time at the facility and national levels. Methodology: The primary antimicrobial use metric reported to the AU Option is antimicrobial days per 1,000 days present. An antimicrobial day (also known as day of therapy) is defined by any amount of a specific antimicrobial agent administered in a calendar day to a particular patient as documented in the electronic medication administration record (eMAR) and/or bar coding medication record (BCMA) (refer to Numerator Data section starting on page 14-4 for more information); all antimicrobial days for a specific agent administered across a population are summed in aggregate.8-11 Days present are defined as the aggregate number of patients housed in a patient care location or facility anytime throughout a day during a calendar month (refer to Denominator Data section starting on page 14-6 for more information). For each facility, the numerator (antimicrobial days) is aggregated by month for each patient care location and overall for inpatient areas facility-wide (specifically, facility-wide inpatient or FacWideIN). Similarly, the denominator (days present) is calculated for the corresponding patient care- location-month or facility-wide inpatient-month. A secondary antimicrobial use metric, antimicrobial days per 100 admissions, is reported to the AU Option for facility-wide inpatient (FacWideIN) data. The numerator and denominators are further defined below and must adhere to the data format prescribed by the HL7 CDA Implementation Guide developed by the CDC and HL7.7 Manual data entry is not available for the NHSN AU Option. Settings: All inpatient facilities (for example, general acute care hospitals, critical access hospitals, children’s hospitals, oncology hospitals, long term acute care hospitals, inpatient rehabilitation facilities, inpatient psychiatric hospitals) enrolled in NHSN and reporting to the Patient Safety Component can participate in the AU Option. Facilities must have the ability to collect the numerator and denominator data electronically and upload those data into NHSN using the required CDA specifications. NHSN does not currently support the submission of data into the AU Option from ambulatory surgery centers, long term care facilities (specifically, skilled nursing facilities, nursing homes) or outpatient dialysis facilities. 14-2 February 2021 NHSN strongly encourages the submission of data from all NHSN-defined inpatient locations (including procedural areas like operating rooms), facility-wide inpatient (FacWideIN), and select outpatient acute care settings (specifically, outpatient emergency department [ED], pediatric emergency department [ED], and 24-hour observation area) from which the numerator and denominator data can be accurately captured. The AU Option does not accept data from other outpatient locations such as outpatient clinics. The FacWideIN record should contain data from all inpatient locations and inpatient procedural areas from which the numerator and denominator can be accurately captured. A comprehensive submission will enable a facility to optimize inter- and/or intra-facility comparisons among specific wards, combined wards, and facility-wide data. NHSN delineates a CDC-defined designation (CDC Location) for patient care areas/locations where patients have similar disease conditions or are receiving care for similar medical or surgical specialties. Each facility location is “mapped” to one CDC Location within the NHSN facility. The specific CDC Location code is determined by the type of patients cared for in that area according to the NHSN location mapping algorithm for acuity level and service type. The patient care areas include adult, pediatric, and neonatal units as defined by NHSN Codes. See the NHSN Locations chapter for more information regarding location mapping. Note: use the same patient care locations throughout NHSN for both AUR and HAI reporting. Facilities should not map separate locations only for AUR reporting. Requirements Each month: 1. The facility must indicate the specific locations from which they plan to submit antimicrobial use data in the Patient Safety Monthly Reporting Plan. a. When reporting AU Option data from inpatient and outpatient locations, list FacWideIN, each individual inpatient location, and each individual outpatient location as separate rows in the plan. 2. The CDA files submitted by the facility contain all data fields outlined in the Table of Instructions (Appendix A) for each location. 3. The facility uploads data via CDA files for all locations indicated in the Monthly Reporting Plan. a. Submit one file for each individual patient care location as well as a separate file for FacWideIN. As an example, a facility with three patient